HD6417727BP160CV Datasheet, PDF (763/1098 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family/ SH7700 Series

23.6.2 Cable Disconnection
USB function
Cable connection state
VBUS pin = 1
Section 23 USB Function Controller
Application
Disconnect USB cable
USBF_VBUS pin = 0
(USBIFR/VBUSMN = 0)
USBIFR1/VBUSF = 1
Interrupt request
USB bus connection interrupt
Clear VBUSF flag
(USBIFR/VBUSF)
Reset UDC core
End
Figure 23.3 Cable Disconnection Operation
The above flowchart shows the operation in cable disconnection. When a USB bus connection
interrupt occurs, disconnection can be detected by confirming the status of the USBF_VBUS pin.
Rev.6.00 Mar. 27, 2009 Page 705 of 1036
REJ09B0254-0600